Pelagus is a state constituency in Sarawak, Malaysia, that has been represented in the Sarawak State Legislative Assembly since 1969.
Established during the 1968 redistribution, the constituency is required to elect a single member to the Sarawak State Legislative Assembly using the first-past-the-post voting system.
As of 2020, Pelagus has a population of 11,877 people.
According to the gazette issued on 31 October 2022, the Pelagus constituency has a total of 4 polling districts.